CN106131964A - The communication means of WLAN, communicator, access point and website - Google Patents
The communication means of WLAN, communicator, access point and website Download PDFInfo
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- CN106131964A CN106131964A CN201610411524.9A CN201610411524A CN106131964A CN 106131964 A CN106131964 A CN 106131964A CN 201610411524 A CN201610411524 A CN 201610411524A CN 106131964 A CN106131964 A CN 106131964A
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- message frame
- frame
- access point
- website
- confirmation message
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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Abstract
The invention provides the communication means of a kind of WLAN, communicator, access point and website, wherein, the communication means of WLAN includes: generates and confirms message frame, described confirmation message frame is for feeding back the access point reception condition to the uplink data frames that website sends, described confirmation message frame includes indicating bit, described indicating bit is used for indicating access point can send CF End frame after sending described confirmation message frame, and release is turned that website distributes but untapped transfer resource for indicating access point by described CF End frame；Send described confirmation message frame.Technical scheme makes access point can discharge the unnecessary transfer resource turning website distribution, is effectively increased the utilization ratio of frequency spectrum.
Description
Technical field
The present invention relates to communication technical field, in particular to the communication means, a kind of wireless of a kind of WLAN
The communicator of LAN, a kind of access point and a kind of website.
Background technology
In May, 2013,802.11 have set up Wi-Fi of future generation (Wireless Fidelity, Wireless Fidelity) technology
Seminar HEW (High efficiency WLAN, efficient WLAN), i.e. 802.11ax, main research point is to improve
The handling capacity of existing Wi-Fi technology, effective utilization ratio of raising frequency spectrum, raising Consumer's Experience and service quality Q oE
(Quality of Experience), and realize adapting to the communication environment of more crypto set than existing Wi-Fi technology.
The utilization rate that 802.11ax will use multi-user technology to improve frequency spectrum, in the formulation process of standard, AP
(Access Point, access point) can send trigger frame (also referred to as resource allocation message frame) give STA (Station, work station,
Referred to as website) allocation of transmission resources.Specifically, as it is shown in figure 1, a TXOP (Transmission Opportunity,
Transmission opportunity) in, after AP sends trigger frame, each website (STA1, STA2, STA3 and STA4) can send upstream data
Frame, as each website can send UL (Uplink, up) MU (Multi-User, multi-user) PPDU (Physical
Layer Convergence Procedure (PLCP) Protocol Data Unit, physical layer convergence procedure protocol data list
Unit), access point, after receiving these uplink data frames, can send M-BA (Multi Block ACK, multi-user block confirms)
Frame.
Wherein, after AP sends trigger frame, STAs sends the duration of uplink data frames and AP response in trigger frame
MAC (Media Access Control, media interviews control) frame head in Duration (duration) field set by,
Particularly as follows: the duration+SIFS that trigger frame takies (Short Inter-frame Space, short interFrameGap)+repeatedly send up
Duration (the repeatedly)+SIFS (repeatedly) that the duration+M-BA that Frame takies takies, then all of STAs can update oneself
NAV (Network Allocation Vector, network allocation vector).
But, in trigger frame, give the STAs transfer resource distributed for AP, it is possible to all of STAs has only to send out
Send a UL MU PPDU, be not required to all duration resources that AP distributes in trigger frame.Therefore, how AP can be discharged
The unnecessary resource of distribution, to improve the technical problem that the utilization ratio of frequency spectrum becomes urgently to be resolved hurrily.
Summary of the invention
The present invention is based at least one above-mentioned technical problem, it is proposed that the communication party of a kind of new WLAN
Case so that access point can discharge the unnecessary transfer resource turning website distribution, is effectively increased the utilization ratio of frequency spectrum.
In view of this, according to the first aspect of the invention, it is proposed that the communication means of a kind of WLAN, including: raw
Becoming to confirm message frame, described confirmation message frame is for feeding back the access point reception condition to the uplink data frames that website sends, institute
Stating in confirmation message frame and include indicating bit, described indicating bit is used for indicating access point can send out after sending described confirmation message frame
Send CF (Contention-Free)-End frame, described CF-End frame for indicate access point release is turned website distribution but
Untapped transfer resource；Send described confirmation message frame.
In this technical scheme, by arranging indicating bit in confirming message frame, to send to website instruction access point
Confirm to send CF-End frame after message frame, enabling can discharge to website notice access point that turn website distribution but not make
Transfer resource, and then website can access point release transfer resource on contention access channel.Visible, the skill of the present invention
Art scheme makes access point can discharge the unnecessary transfer resource turning website distribution, is effectively increased the utilization effect of frequency spectrum
Rate.Wherein, website can update the NAV of self to access channel after receiving CF-End frame.
Additionally, in this technical scheme, described confirmation message frame is that multiuser downstream confirms that message frame, i.e. this confirmation disappear
Breath frame is that AP is for using OFDMA (Orthogonal Frequency Division Multiple Access, orthogonal frequency
Multiple access) the reception state of uplink data frames feedback transmitted of multiple websites of technology.
In one embodiment of the invention, described transfer resource includes that bandwidth resources that access point distributes, website are adopted
MCS (Modulation and Coding Scheme, modulation and coding strategy) parameter, the distribution information of wireless resource block
And spatial reuse information etc..
In technique scheme, it is preferable that before the described step generating confirmation message frame, also include: generate logical
Letter resource allocation message frame, described communication resource distribution message frame is for website allocation of transmission resources；Send described communication money
Source assignment messages frame, and the upper line number that receiving station is sent according to the transfer resource that described communication resource distribution message frame indicates
According to frame；Judge that the upstream data of all websites is the most all sent completely；All it is sent completely at the upstream data judging all websites
Time, perform the described step generating and confirming message frame.
Specifically, when access point by communication resource distribution message frame after website allocation of transmission resources, if all stations
The upstream data of point is all sent completely, then access point can discharge remaining transfer resource, i.e. at the confirmation message frame generated
The middle indicating bit that rear extended meeting transmission CF-End frame is set, so that website contention access letter on the transfer resource that access point discharges
Road.
In technique scheme, it is preferable that judge the step that the upstream data of all websites is the most all sent completely, tool
Body includes: the More Data field obtained in described all websites in the mac frame head of the uplink data frames that each website sends
Value；If the value of the More Data field in the mac frame head of the uplink data frames that described all websites send is 0, it is determined that institute
The upstream data stating all websites is all sent completely.
In any of the above-described technical scheme, it is preferable that the communication means of described WLAN, also include: generate described
CF-End frame；After sending described confirmation message frame, and after SIFS, send described CF-End frame.Specifically, such as by upper
The indicating bit stated is set to " 1 " and represents that can send CF-End frame after confirming message frame transmission terminates to be distributed in advance
The gap that TXOP, CF-End frame sends after confirming message frame can be SIFS, and this time slot is also than SIFS certainly
More longer.
In this technical scheme, by confirming after message frame sending, and after SIFS, send CF-End frame so that connect
Access point can will discharge the unnecessary transfer resource turning website distribution to website notice access point, also makes the website can be
Receive after CF-End frame contention access channel on the transfer resource of release, be effectively increased the utilization ratio of frequency spectrum.
In any of the above-described technical scheme, it is preferable that described confirmation message frame includes duration field, described in hold
Continuous time span indicated by duration field is the time span that the time span shared by described confirmation message frame, SIFS take
Summation with the time span shared by described CF-End frame.
According to the second aspect of the invention, it is also proposed that the communication means of a kind of WLAN, including: receive confirmation disappear
Breath frame, described confirmation message frame is for feeding back the access point reception condition to the uplink data frames that website sends, and described confirmation disappears
Including indicating bit in breath frame, described indicating bit is used for indicating access point can send CF-End after sending described confirmation message frame
Frame, release is turned that website distributes but untapped transfer resource for indicating access point by described CF-End frame；Receive described
CF-End frame；After receiving described CF-End frame, and contention access channel after DIFS.
In this technical scheme, owing to confirming message frame to be provided with for indicating access point after sending confirmation message frame
Can send the indicating bit of CF-End frame, therefore website is after receiving confirmation message frame, can detect CF-according to this indicating bit
End frame, with after CF-End frame being detected, contention access channel on the transfer resource of access point release.Visible, the present invention's
Technical scheme makes access point can discharge the unnecessary transfer resource turning website distribution, is effectively increased the utilization effect of frequency spectrum
Rate.Wherein, website can update the NAV of self to access channel after receiving CF-End frame.
In one embodiment of the invention, described transfer resource includes that bandwidth resources that access point distributes, website are adopted
MCS parameter, the distribution information of wireless resource block and spatial reuse information etc..
In technique scheme, it is preferable that before the described step receiving confirmation message frame, also include: receive logical
Letter resource allocation message frame, described communication resource distribution message frame is used for access point to website allocation of transmission resources；According to described
The transfer resource of communication resource distribution message frame instruction sends uplink data frames to access point.
According to the third aspect of the invention we, it is also proposed that the communicator of a kind of WLAN, including: signal generating unit,
For generating confirmation message frame, described confirmation message frame is for feeding back the access point reception feelings to the uplink data frames that website sends
Condition, includes indicating bit in described confirmation message frame, described indicating bit is used for indicating access point sending described confirmation message frame
After can send CF-End frame, described CF-End frame is for indicating that website distribution is turned in release by access point but untapped transmission
Resource；Transmitting element, is used for sending described confirmation message frame.
In this technical scheme, by arranging indicating bit in confirming message frame, to send to website instruction access point
Confirm to send CF-End frame after message frame, enabling can discharge to website notice access point that turn website distribution but not make
Transfer resource, and then website can access point release transfer resource on contention access channel.Visible, the skill of the present invention
Art scheme makes access point can discharge the unnecessary transfer resource turning website distribution, is effectively increased the utilization effect of frequency spectrum
Rate.Wherein, website can update the NAV of self to access channel after receiving CF-End frame.
Additionally, in this technical scheme, described confirmation message frame is that multiuser downstream confirms that message frame, i.e. this confirmation disappear
The reception condition that breath frame feeds back for the uplink data frames using multiple websites of OFDMA technology to be transmitted by AP.
In one embodiment of the invention, described transfer resource includes that bandwidth resources that access point distributes, website are adopted
MCS parameter, the distribution information of wireless resource block and spatial reuse information etc..
In technique scheme, it is preferable that the communicator of described WLAN, also include: receive unit and sentence
Disconnected unit；Wherein, described signal generating unit is additionally operable to, and before generating described confirmation message frame, generates communication resource distribution message
Frame, described communication resource distribution message frame is for website allocation of transmission resources and all for judging at described judging unit
When the upstream data of website is all sent completely, generate described confirmation message frame；Described transmitting element is additionally operable to, and sends described communication
Resource allocation message frame；The transmission money that described reception unit indicates according to described communication resource distribution message frame for receiving station
The uplink data frames that source is sent；Described judging unit is for judging that the upstream data of all websites is the most all sent completely.
Specifically, when access point by communication resource distribution message frame after website allocation of transmission resources, if all stations
The upstream data of point is all sent completely, then access point can discharge remaining transfer resource, i.e. at the confirmation message frame generated
The middle indicating bit that rear extended meeting transmission CF-End frame is set, so that website contention access letter on the transfer resource that access point discharges
Road.
In technique scheme, it is preferable that described judging unit includes: acquiring unit, it is used for obtaining described all stations
The value of the More Data field in the mac frame head of the uplink data frames that each website sends in point；Determine unit, in institute
When the value of the More Data field in the mac frame head of the uplink data frames stating the transmission of all websites is 0, determine described all
The upstream data of website is all sent completely.
In any of the above-described technical scheme, it is preferable that described signal generating unit is additionally operable to, generate described CF-End frame；Described
Transmitting element is additionally operable to, and after sending described confirmation message frame, and sends described CF-End frame after SIFS.Specifically, example
As above-mentioned indicating bit is set to " 1 " represent confirm message frame send after can send CF-End frame terminate in advance divide
The gap that the TXOP prepared, CF-End frame sends after confirming message frame can be SIFS, and also may be used in this time slot certainly
More longer than SIFS.
In this technical scheme, by confirming after message frame sending, and after SIFS, send CF-End frame so that connect
Access point can will discharge the unnecessary transfer resource turning website distribution to website notice access point, also makes the website can be
Receive after CF-End frame contention access channel on the transfer resource of release, be effectively increased the utilization ratio of frequency spectrum.
In any of the above-described technical scheme, it is preferable that described confirmation message frame includes duration field, described in hold
Continuous time span indicated by duration field is the time span that the time span shared by described confirmation message frame, SIFS take
Summation with the time span shared by described CF-End frame.
According to the fourth aspect of the invention, it is also proposed that the communicator of a kind of WLAN, including: receive unit,
For receiving confirmation message frame, described confirmation message frame is for feeding back the access point reception feelings to the uplink data frames that website sends
Condition, includes indicating bit in described confirmation message frame, described indicating bit is used for indicating access point sending described confirmation message frame
After can send CF-End frame, described CF-End frame is for indicating that website distribution is turned in release by access point but untapped transmission
Resource, and be used for receiving described CF-End frame；Processing unit, is used for after described reception unit receives described CF-End frame,
And after DIFS contention access channel.
In this technical scheme, owing to confirming message frame to be provided with for indicating access point after sending confirmation message frame
Can send the indicating bit of CF-End frame, therefore website is after receiving confirmation message frame, can detect CF-according to this indicating bit
End frame, with after CF-End frame being detected, contention access channel on the transfer resource of access point release.Visible, the present invention's
Technical scheme makes access point can discharge the unnecessary transfer resource turning website distribution, is effectively increased the utilization effect of frequency spectrum
Rate.Wherein, website can update the NAV of self to access channel after receiving CF-End frame.
In one embodiment of the invention, described transfer resource includes that bandwidth resources that access point distributes, website are adopted
MCS parameter, the distribution information of wireless resource block and spatial reuse information etc..
In technique scheme, it is preferable that described reception unit is additionally operable to: before receiving described confirmation message frame,
Receiving communication resource distribution message frame, described communication resource distribution message frame is used for access point to website allocation of transmission resources；Institute
The communicator stating WLAN also includes: transmitting element, for the biography according to the instruction of described communication resource distribution message frame
Defeated resource sends uplink data frames to access point.
According to the fifth aspect of the invention, it is also proposed that a kind of access point, including wireless as described in the above-mentioned third aspect
The communicator of LAN.
According to the sixth aspect of the invention, it is also proposed that a kind of website, including the wireless office as described in above-mentioned fourth aspect
The communicator of territory net.
By above technical scheme so that access point can discharge the unnecessary transfer resource turning website distribution, effectively
Improve the utilization ratio of frequency spectrum.
Accompanying drawing explanation
Fig. 1 shows the interaction schematic diagram of access point and website in a transmission opportunity in correlation technique；
Fig. 2 shows the schematic flow diagram of the communication means of WLAN according to first embodiment of the invention；
Fig. 3 shows the schematic flow diagram of the communication means of the WLAN of second embodiment according to the present invention；
Fig. 4 shows the schematic block diagram of the communicator of WLAN according to first embodiment of the invention；
Fig. 5 shows the schematic block diagram of access point according to an embodiment of the invention；
Fig. 6 shows the schematic flow diagram of the communication means of the WLAN of the 3rd embodiment according to the present invention；
Fig. 7 shows the schematic flow diagram of the communication means of the WLAN of the 4th embodiment according to the present invention；
Fig. 8 shows the schematic block diagram of the communicator of the WLAN of second embodiment according to the present invention；
Fig. 9 shows the schematic block diagram of website according to an embodiment of the invention；
Figure 10 shows access point and the interaction of website in a transmission opportunity according to an embodiment of the invention
Schematic diagram；
Figure 11 shows the schematic flow diagram of the communication means of the WLAN of the 5th embodiment according to the present invention.
Detailed description of the invention
In order to be more clearly understood that the above-mentioned purpose of the present invention, feature and advantage, real with concrete below in conjunction with the accompanying drawings
The present invention is further described in detail by mode of executing.It should be noted that in the case of not conflicting, the enforcement of the application
Feature in example and embodiment can be mutually combined.
Elaborate a lot of detail in the following description so that fully understanding the present invention, but, the present invention also may be used
Implementing to use other to be different from other modes described here, therefore, protection scope of the present invention is not by described below
The restriction of specific embodiment.
Fig. 2 shows the schematic flow diagram of the communication means of WLAN according to first embodiment of the invention.
As in figure 2 it is shown, the communication means of WLAN according to first embodiment of the invention, including:
Step S20, generates and confirms message frame, and described confirmation message frame is for feeding back the upper line number that website is sent by access point
According to the reception condition of frame, including indicating bit in described confirmation message frame, described indicating bit is used for indicating access point sending institute
Can send CF (Contention-Free)-End frame after stating confirmation message frame, described CF-End frame is used for indicating access point to release
Bleed off that distribute but untapped transfer resource to website.Wherein, described confirmation message frame is that multiuser downstream confirms message
The reception that frame, i.e. this confirmation message frame feed back for the uplink data frames using multiple websites of OFDMA technology to be transmitted by AP
State.
In one embodiment of the invention, described transfer resource includes that bandwidth resources that access point distributes, website are adopted
MCS parameter, the distribution information of wireless resource block and spatial reuse information etc..
Wherein, described confirmation message frame includes duration field, the time indicated by described duration field
Shared by time span that time span shared by a length of described confirmation message frame, SIFS take and described CF-End frame
The summation of time span.
Step S22, sends described confirmation message frame.
In one embodiment of the invention, the communication means of described WLAN, also include: generate described CF-End
Frame；After sending described confirmation message frame, and after SIFS, send described CF-End frame.Specifically, such as by above-mentioned finger
Show that position is set to " 1 " and represents that can send CF-End frame after confirming message frame transmission terminates distributed TXOP in advance,
CF-End frame can be SIFS confirming the gap sent after message frame, certainly this time slot also longer than SIFS one
Point.
In this technical scheme, by confirming after message frame sending, and after SIFS, send CF-End frame so that connect
Access point can will discharge the unnecessary transfer resource turning website distribution to website notice access point, also makes the website can be
Receive after CF-End frame contention access channel on the transfer resource of release, be effectively increased the utilization ratio of frequency spectrum.
In one embodiment of the invention, as it is shown on figure 3, before step S20, also include:
Step S30, generates communication resource distribution message frame, and described communication resource distribution message frame is for passing to website distribution
Defeated resource.
Step S32, sends described communication resource distribution message frame, and receiving station is according to described communication resource distribution message
The uplink data frames that the transfer resource of frame instruction is sent.
Step S34, it is judged that the upstream data of all websites is the most all sent completely, and judging the upper line number of all websites
According to when being all sent completely, perform step S20.
Specifically, when access point by communication resource distribution message frame after website allocation of transmission resources, if all stations
The upstream data of point is all sent completely, then access point can discharge remaining transfer resource, i.e. at the confirmation message frame generated
The middle indicating bit that rear extended meeting transmission CF-End frame is set, so that website contention access letter on the transfer resource that access point discharges
Road.
In one embodiment of the invention, step S34 specifically includes: obtains each website in described all websites and sends
Uplink data frames mac frame head in the value of More Data field；If the uplink data frames that described all websites send
The value of the More Data field in mac frame head is 0, it is determined that the upstream data of described all websites is all sent completely.
In the communication means of the WLAN shown in Fig. 2 and Fig. 3, by arranging indicating bit in confirming message frame,
So that CF-End frame can be sent to website instruction access point after sending confirmation message frame, enabling notify access point meeting to website
That website distributes but untapped transfer resource is turned in release, and then website can be competed on the transfer resource of access point release
Access channel.Visible, technical scheme makes access point can discharge the unnecessary transfer resource turning website distribution,
It is effectively increased the utilization ratio of frequency spectrum.Wherein, website can update the NAV of self to access letter after receiving CF-End frame
Road.
Wherein, the executive agent of the communication means shown in Fig. 2 and Fig. 3 can be router etc..
Fig. 4 shows the schematic block diagram of the communicator of WLAN according to first embodiment of the invention.
As shown in Figure 4, the communicator 400 of WLAN according to first embodiment of the invention, including: generate
Unit 402 and transmitting element 404.
Wherein, signal generating unit 402 is used for generating confirmation message frame, and described confirmation message frame is used for feeding back access point to website
The reception condition of the uplink data frames sent, includes indicating bit in described confirmation message frame, described indicating bit connects for instruction
Access point can send CF-End frame after sending described confirmation message frame, and described CF-End frame is used for indicating access point release to be turned
That website distributes but untapped transfer resource；Transmitting element 404 is used for sending described confirmation message frame.
When implementing, signal generating unit 402 can be signal processor, central processing unit or baseband processor etc.；Send out
Sending unit 404 can be transmitter (Transmitter) or antenna.
In this technical scheme, by arranging indicating bit in confirming message frame, to send to website instruction access point
Confirm to send CF-End frame after message frame, enabling can discharge to website notice access point that turn website distribution but not make
Transfer resource, and then website can access point release transfer resource on contention access channel.Visible, the skill of the present invention
Art scheme makes access point can discharge the unnecessary transfer resource turning website distribution, is effectively increased the utilization effect of frequency spectrum
Rate.Wherein, website can update the NAV of self to access channel after receiving CF-End frame.
Additionally, in this technical scheme, described confirmation message frame is that multiuser downstream confirms that message frame, i.e. this confirmation disappear
The reception condition that breath frame feeds back for the uplink data frames using multiple websites of OFDMA technology to be transmitted by AP.
In technique scheme, it is preferable that the communicator 400 of described WLAN, also include: receive unit
406 and judging unit 408.
Wherein, described signal generating unit 402 is additionally operable to, and before generating described confirmation message frame, generates communication resource distribution
Message frame, described communication resource distribution message frame is used for website allocation of transmission resources, and for sentencing at described judging unit 408
When the upstream data of fixed all websites is all sent completely, generate described confirmation message frame；Described transmitting element 404 is additionally operable to, and sends out
Send described communication resource distribution message frame；Described reception unit 406 is used for receiving station according to described communication resource distribution message
The uplink data frames that the transfer resource of frame instruction is sent；Described judging unit 408 is for judging the upstream data of all websites
The most all it is sent completely.
Specifically, when access point by communication resource distribution message frame after website allocation of transmission resources, if all stations
The upstream data of point is all sent completely, then access point can discharge remaining transfer resource, i.e. at the confirmation message frame generated
The middle indicating bit that rear extended meeting transmission CF-End frame is set, so that website contention access letter on the transfer resource that access point discharges
Road.
When implementing, receiving unit 406 can be receptor or antenna；Judging unit 408 can be that central authorities process
Device or baseband processor etc..
In technique scheme, it is preferable that described judging unit 408 includes: acquiring unit 4082 and determine unit
4084。
Wherein, acquiring unit 4082 is for obtaining the MAC of the uplink data frames that each website sends in described all websites
The value of the More Data field in frame head；Determine the MAC of the unit 4084 uplink data frames for sending at described all websites
When the value of the More Data field in frame head is 0, determine that the upstream data of described all websites is all sent completely.
In any of the above-described technical scheme, it is preferable that described signal generating unit 402 is additionally operable to, generate described CF-End frame；Institute
State transmitting element 404 to be additionally operable to, after sending described confirmation message frame, and after SIFS, send described CF-End frame.Specifically
Ground, is such as set to above-mentioned indicating bit " 1 " and represents that can send CF-End frame after confirming message frame transmission ties in advance
The gap that TXOP, the CF-End frame that bundle is distributed sends after confirming message frame can be SIFS, certainly between this time
Gap is also more longer than SIFS.
In this technical scheme, by confirming after message frame sending, and after SIFS, send CF-End frame so that connect
Access point can will discharge the unnecessary transfer resource turning website distribution to website notice access point, also makes the website can be
Receive after CF-End frame contention access channel on the transfer resource of release, be effectively increased the utilization ratio of frequency spectrum.
In any of the above-described technical scheme, it is preferable that described confirmation message frame includes duration field, described in hold
Continuous time span indicated by duration field is the time span that the time span shared by described confirmation message frame, SIFS take
Summation with the time span shared by described CF-End frame.
Fig. 5 shows the schematic block diagram of access point according to an embodiment of the invention.
As it is shown in figure 5, access point 500 according to an embodiment of the invention, including: WLAN as shown in Figure 4
Communicator 400.
Fig. 6 shows the schematic flow diagram of the communication means of the WLAN of the 3rd embodiment according to the present invention.
As shown in Figure 6, according to the communication means of the WLAN of the 3rd embodiment of the present invention, including:
Step S60, receives and confirms message frame, and described confirmation message frame is for feeding back the upper line number that website is sent by access point
According to the reception condition of frame, including indicating bit in described confirmation message frame, described indicating bit is used for indicating access point sending institute
State confirmation message frame after can send CF-End frame, described CF-End frame for indicate access point release is turned website distribution but
Untapped transfer resource.
Step S62, receives described CF-End frame.
Step S64, after receiving described CF-End frame, and contention access channel after DIFS.
In this technical scheme, owing to confirming message frame to be provided with for indicating access point after sending confirmation message frame
Can send the indicating bit of CF-End frame, therefore website is after receiving confirmation message frame, can detect CF-according to this indicating bit
End frame, with after CF-End frame being detected, contention access channel on the transfer resource of access point release.Visible, the present invention's
Technical scheme makes access point can discharge the unnecessary transfer resource turning website distribution, is effectively increased the utilization effect of frequency spectrum
Rate.Wherein, website can update the NAV of self to access channel after receiving CF-End frame.
In one embodiment of the invention, as it is shown in fig. 7, before step S60, also include:
Step S70, receives communication resource distribution message frame, and this communication resource distribution message frame divides to website for access point
Join transfer resource.
Step S72, sends upstream data according to the transfer resource of described communication resource distribution message frame instruction to access point
Frame.
Wherein, the executive agent of the communication means shown in Fig. 6 and Fig. 7 can be mobile phone, PDA (Personal
Digital Assistant, palm PC) etc..
Fig. 8 shows the schematic block diagram of the communicator of the WLAN of second embodiment according to the present invention.
As shown in Figure 8, according to the communicator 800 of the WLAN of second embodiment of the present invention, including: receive
Unit 802 and processing unit 804.
Wherein, receiving unit 802 and be used for receiving confirmation message frame, described confirmation message frame is used for feeding back access point to website
The reception condition of the uplink data frames sent, includes indicating bit in described confirmation message frame, described indicating bit connects for instruction
Access point can send CF-End frame after sending described confirmation message frame, and described CF-End frame is used for indicating access point release to be turned
That website distributes but untapped transfer resource, and be used for receiving described CF-End frame；Processing unit 804 is in described reception
After unit 802 receives described CF-End frame, and contention access channel after DIFS.
When implementing, receiving unit 802 can be receptor or antenna；Processing unit 804 can be that central authorities process
Device or baseband processor etc..
In this technical scheme, owing to confirming message frame to be provided with for indicating access point after sending confirmation message frame
Can send the indicating bit of CF-End frame, therefore website is after receiving confirmation message frame, can detect CF-according to this indicating bit
End frame, with after CF-End frame being detected, contention access channel on the transfer resource of access point release.Visible, the present invention's
Technical scheme makes access point can discharge the unnecessary transfer resource turning website distribution, is effectively increased the utilization effect of frequency spectrum
Rate.Wherein, website can update the NAV of self to access channel after receiving CF-End frame.
In technique scheme, it is preferable that described reception unit 802 is additionally operable to: receive described confirmation message frame it
Before, receiving communication resource distribution message frame, described communication resource distribution message frame is used for access point to website allocation of transmission resources；
The communicator 800 of described WLAN also includes: transmitting element 806, for according to described communication resource distribution message frame
The transfer resource of instruction sends uplink data frames to access point.
When implementing, transmitting element 806 can be transmitter (Transmitter) or antenna.
Fig. 9 shows the schematic block diagram of website according to an embodiment of the invention.
As it is shown in figure 9, website 900 according to an embodiment of the invention, including: WLAN as shown in Figure 8
Communicator 800.
In sum, technical scheme mainly makes AP to be released in by the way of M-BA+CF-End
Trigger frame (i.e. communication resource distribution message frame) is distributed to website but do not make the transfer resource being finished.Wherein, this transmission
Resource includes MCS parameter, the distribution information of wireless resource block and the spatial reuse that bandwidth resources that access point distributes, website use
Information etc..The most as shown in Figure 10, in a transmission opportunity, if all of website only need to send a UL MU PPDU, and
Need not all durations that AP is distributed in trigger frame, then AP can send CF-End frame after sending M-BA to STAs, with
Dischargeing remaining duration resource, the TXOP duration resource that discharges referred to as intercepted at this, then other websites can be
Contention access channel in the TXOP intercepted.
Specifically include following steps:
Step 1:AP is after having sent trigger frame, when receiving the uplink data frames that STAs sends, if all STAs
The More Data field of the mac frame head of the uplink data frames sent is disposed as " 0 ", then it represents that all of STAs does not goes up
Row data need to continue transmission, and now these upstream datas transmitted can be replied and be confirmed message frame M-BA by AP.
Step 2:AP replys M-BA message frame to STAs.
Wherein, AP can carry indicating bit in M-BA message frame, indicates follow-up AP can send CF-End frame and discharges not
There is the transfer resource making to be finished；In the mac frame head of M-BA frame, the value of Duration field is set to: the duration shared by M-BA+
Duration shared by SIFS+CF-End frame.
Step 3:AP, after having sent CF-End frame, represents and does not has the resource release used complete, and then other STAs can
To access this section of channel resource.
Figure 11 shows the schematic flow diagram of the communication means of the WLAN of the 5th embodiment according to the present invention.
As shown in figure 11, according to the communication means of the WLAN of the 5th embodiment of the present invention, including:
Step 1101, access point 1 generates trigger frame.Wherein, trigger frame contains the biography that access point 1 distributes to website 2
Defeated resource.
Step 1102, access point 1 sends trigger frame.
Step 1103, website 2 receives trigger frame.
Step 1104, website 2 obtains the transfer resource of distribution in trigger frame.
Step 1105, website 2 sends uplink data frames based on the transfer resource got to access point 1.
Step 1106, the uplink data frames that access point 1 receiving station 2 sends.
Step 1107, access point 1 generates and confirms message frame.Wherein, when the upstream data that access point 1 sends according to website 2
Frame determines that, when all websites all do not have upstream data to need to continue transmission, indicating bit on band, connects with instruction in confirming message frame
After access point 1, extended meeting sends CF-End frame and discharges the transfer resource not making to be finished.
Step 1108, access point 1 sends and confirms message frame.
Step 1109, access point 1 sends CF-End frame.When other websites are after receiving CF-End frame, can be based on connecing
The transfer resource contention access channel that access point 1 discharges.
Technical scheme being described in detail above in association with accompanying drawing, the present invention proposes a kind of new WLAN
Communication plan so that access point can discharge turns website distribution unnecessary transfer resource, be effectively increased the profit of frequency spectrum
Use efficiency.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (16)
1. the communication means of a WLAN, it is characterised in that including:
Generating and confirm message frame, described confirmation message frame is for feeding back the access point reception feelings to the uplink data frames that website sends
Condition, includes indicating bit in described confirmation message frame, described indicating bit is used for indicating access point sending described confirmation message frame
After can send CF-End frame, described CF-End frame is for indicating that website distribution is turned in release by access point but untapped transmission
Resource；
Send described confirmation message frame.
The communication means of WLAN the most according to claim 1, it is characterised in that confirm message frame described generation
Step before, also include:
Generating communication resource distribution message frame, described communication resource distribution message frame is for website allocation of transmission resources；
Send described communication resource distribution message frame, and the transmission that receiving station indicates according to described communication resource distribution message frame
The uplink data frames that resource is sent；
Judge that the upstream data of all websites is the most all sent completely；
When the upstream data judging all websites is all sent completely, perform the described step generating and confirming message frame.
The communication means of WLAN the most according to claim 2, it is characterised in that all websites of described judgement upper
The step that row data are the most all sent completely, specifically includes:
The value of the More Data field obtained in described all websites in the mac frame head of the uplink data frames that each website sends；
If the value of the More Data field in the mac frame head of the uplink data frames that described all websites send is 0, it is determined that
The upstream data of described all websites is all sent completely.
The communication means of WLAN the most according to any one of claim 1 to 3, it is characterised in that also include:
Generate described CF-End frame；
After sending described confirmation message frame, and after SIFS, send described CF-End frame.
The communication means of WLAN the most according to any one of claim 1 to 3, it is characterised in that described confirmation
Including duration field in message frame, the time span indicated by described duration field is described confirmation message frame institute
The summation of the time span shared by time span that the time span that takies, SIFS take and described CF-End frame.
6. the communication means of a WLAN, it is characterised in that including:
Receiving and confirm message frame, described confirmation message frame is for feeding back the access point reception feelings to the uplink data frames that website sends
Condition, includes indicating bit in described confirmation message frame, described indicating bit is used for indicating access point sending described confirmation message frame
After can send CF-End frame, described CF-End frame is for indicating that website distribution is turned in release by access point but untapped transmission
Resource；
Receive described CF-End frame；
After receiving described CF-End frame, and contention access channel after DIFS.
The communication means of WLAN the most according to claim 6, it is characterised in that confirm message frame described reception
Step before, also include:
Receiving communication resource distribution message frame, described communication resource distribution message frame provides to website distribution transmission for access point
Source；
Transfer resource according to the instruction of described communication resource distribution message frame sends uplink data frames to access point.
8. the communicator of a WLAN, it is characterised in that including:
Signal generating unit, is used for generating confirmation message frame, and described confirmation message frame is up for feed back that website sends by access point
The reception condition of Frame, includes indicating bit in described confirmation message frame, described indicating bit is used for indicating access point sending
Can send CF-End frame after described confirmation message frame, release is turned website distribution for indicating access point by described CF-End frame
But untapped transfer resource；
Transmitting element, is used for sending described confirmation message frame.
The communicator of WLAN the most according to claim 8, it is characterised in that also include: receive unit and sentence
Disconnected unit；
Wherein, described signal generating unit is additionally operable to, and before generating described confirmation message frame, generates communication resource distribution message frame,
Described communication resource distribution message frame is used for website allocation of transmission resources, and for judging all websites at described judging unit
Upstream data when being all sent completely, generate described confirmation message frame；
Described transmitting element is additionally operable to, and sends described communication resource distribution message frame；
Described reception unit is sent according to the transfer resource that described communication resource distribution message frame indicates for receiving station
Uplink data frames；
Described judging unit is for judging that the upstream data of all websites is the most all sent completely.
The communicator of WLAN the most according to claim 9, it is characterised in that described judging unit includes:
Acquiring unit, for the More obtained in described all websites in the mac frame head of the uplink data frames that each website sends
The value of Data field；
Determine unit, the value of the More Data field in the mac frame head of the uplink data frames sent at described all websites
When being 0, determine that the upstream data of described all websites is all sent completely.
11. according to Claim 8 to the communicator of the WLAN according to any one of 10, it is characterised in that:
Described signal generating unit is additionally operable to, and generates described CF-End frame；
Described transmitting element is additionally operable to, and after sending described confirmation message frame, and sends described CF-End frame after SIFS.
12. according to Claim 8 to the communicator of the WLAN according to any one of 10, it is characterised in that described really
Recognizing and include duration field in message frame, the time span indicated by described duration field is described confirmation message frame
The summation of the time span shared by time span that shared time span, SIFS take and described CF-End frame.
The communicator of 13. 1 kinds of WLANs, it is characterised in that including:
Receiving unit, be used for receiving confirmation message frame, described confirmation message frame is up for feed back that website sends by access point
The reception condition of Frame, includes indicating bit in described confirmation message frame, described indicating bit is used for indicating access point sending
Can send CF-End frame after described confirmation message frame, release is turned website distribution for indicating access point by described CF-End frame
But untapped transfer resource, and it is used for receiving described CF-End frame；
Processing unit, is used for after described reception unit receives described CF-End frame, and contention access channel after DIFS.
The communicator of 14. WLANs according to claim 13, it is characterised in that described reception unit is also used
In: before receiving described confirmation message frame, receiving communication resource distribution message frame, described communication resource distribution message frame is used for
Access point is to website allocation of transmission resources；
The communicator of described WLAN also includes: transmitting element, for referring to according to described communication resource distribution message frame
The transfer resource shown sends uplink data frames to access point.
15. 1 kinds of access points, it is characterised in that including: leading to of the WLAN as according to any one of claim 8 to 12
T unit.
16. 1 kinds of websites, it is characterised in that including: the communicator of the WLAN as described in claim 13 or 14.
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| CN201610411524.9A CN106131964A (en) | 2016-06-13 | 2016-06-13 | The communication means of WLAN, communicator, access point and website |
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| CN201610411524.9A CN106131964A (en) | 2016-06-13 | 2016-06-13 | The communication means of WLAN, communicator, access point and website |
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